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Cheap flights from London Heathrow Airport to Allentown from £438

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ABE
26 Jun — 3 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Allentown

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Allentown
Explore the most affordable flight options available from Heathrow to Allentown. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 May 2026.

Mon 28/913:25
LHR
-
ABE
1 stop32h 56m
KLM
Thu 29/1013:00
ABE
-
LHR
1 stop16h 00m
KLM
Deal found 23/5£698
Fri 4/1208:55
LHR
-
ABE
1 stop18h 51m
Virgin Atlantic
Wed 9/1206:30
ABE
-
LHR
1 stop21h 30m
Virgin Atlantic
Deal found 26/5£711
Mon 28/909:20
LHR
-
ABE
1 stop13h 01m
Delta
Thu 29/1013:00
ABE
-
LHR
2 stops15h 45m
Delta
Deal found 23/5£721
Thu 9/709:20
LHR
-
ABE
1 stop18h 48m
Virgin Atlantic
Thu 16/718:05
ABE
-
LHR
2 stops17h 30m
Virgin Atlantic
Deal found 27/5£751
Thu 9/711:30
LHR
-
ABE
2 stops34h 55m
Air France
Thu 16/713:08
ABE
-
LHR
2 stops19h 37m
Air France
Deal found 27/5£771
Thu 9/715:00
LHR
-
ABE
1 stop14h 23m
American Airlines
Thu 16/717:12
ABE
-
LHR
1 stop13h 03m
American Airlines
Deal found 25/5£772
Wed 10/613:25
LHR
-
ABE
1 stop14h 43m
Virgin Atlantic
Tue 23/613:12
ABE
-
LHR
2 stops15h 38m
Virgin Atlantic
Deal found 23/5£778
Tue 30/615:50
LHR
-
ABE
2 stops30h 40m
Air France
Sat 4/718:09
ABE
-
LHR
2 stops46h 16m
Air France
Deal found 26/5£781
Wed 10/611:10
LHR
-
ABE
1 stop17h 09m
Multiple Airlines
Tue 23/606:00
ABE
-
LHR
1 stop24h 15m
Multiple Airlines
Deal found 23/5£782
Wed 10/608:40
LHR
-
ABE
2 stops37h 50m
KLM
Tue 23/618:05
ABE
-
LHR
2 stops17h 10m
KLM
Deal found 23/5£800

Find flight deals from Heathrow to Allentown

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Allentown (ABE). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 27 May 2026.

Round-trip from

£698

One-way from

£438
KLM
  • KLM
  • 28/9-29/10
  • 2 total stops
  • 48h 56m total
  • London to Allentown
Search Deals
8/6
  • 8/6
  • 3 total stops
  • 48h 46m total
  • London to Allentown
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Allentown that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 27 May 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Allentown that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 9/7

11:30-17:25

2 stops34h 55m

Allentown-Bethlehem

Thu 16/7

13:08-13:45

2 stops19h 37m

£771
Fastest return journey

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 9/7

15:00-00:23

1 stop14h 23m

Allentown-Bethlehem

Thu 16/7

17:12-11:15

1 stop13h 03m

£772

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 10/6

11:10-23:19

1 stop17h 09m

Allentown-Bethlehem

Tue 23/6

06:00-11:15

1 stop24h 15m

£782

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 9/7

14:45-23:08

1 stop13h 23m

Allentown-Bethlehem

Thu 16/7

06:15-06:25

2 stops19h 10m

£813

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 9/7

06:15-23:08

2 stops21h 53m

Allentown-Bethlehem

Thu 16/7

13:08-13:45

2 stops19h 37m

£833

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 29/7

06:15-17:25

2 stops16h 10m

Allentown-Bethlehem

Wed 5/8

18:13-06:25

1 stop31h 12m

£864

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 9/7

08:00-17:01

1 stop14h 01m

Allentown-Bethlehem

Thu 16/7

10:35-06:45

1 stop15h 10m

£943

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 11/7

06:50-09:58

2 stops32h 08m

Allentown-Bethlehem

Sat 18/7

10:35-07:15

2 stops15h 40m

£967

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Mon 17/8

13:25-17:23

1 stop32h 58m

Allentown-Bethlehem

Sat 22/8

18:13-07:15

1 stop32h 02m

£1,003

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 31/7

09:20-12:07

1 stop31h 47m

Allentown-Bethlehem

Thu 6/8

18:13-13:15

1 stop14h 02m

£1,036

Flights are sorted by cheapest return flights first.

Deals found on 25/5

Showing 1-10 of 22 resultsSorted by cheapest first
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Best time to book a flight from Heathrow to Allentown

Have a flexible travel schedule? Discover the best time to fly to Allentown from Heathrow with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Allentown. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Allentown from London Heathrow?

    Most people fly into Allentown-Bethlehem (ABE) if they book a flight to Allentown from London Heathrow. On average, Allentown-Bethlehem has 0 inbound flights from London Heathrow per day from 0 airlines. Allentown-Bethlehem is conveniently located just 3.9 mi from Allentown’s city center.

  • How long is the flight from London Heathrow Airport to Allentown?

    Airlines like Air France, American Airlines, and Finnair fly from London Heathrow Airport to Allentown in about 13h 23m. The time it takes to get you to your destination can typically vary by up to 21h 32m. The distance between London Heathrow Airport and Allentown is about 3507 mi. Both multi-stop and direct flights can be found to your destination and back.

  • Can I find deals for flights from Heathrow to Allentown that include hotel bookings?

    Yes. In addition to deals on Heathrow to Allentown flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Allentown?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Allentown.

  • Can I find deals for business class flights from Heathrow to Allentown?

    Yes. Cheapflights offers flight deals from Heathrow to Allentown by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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How does Cheapflights help users find flights from Heathrow to Allentown?

Deals for Heathrow to Allentown flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Allentown?

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Allentown for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Heathrow to Allentown with no change fees?

Need flexible booking options for your flight to Allentown from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Allentown become cheaper?

Yes! Start tracking prices for Heathrow to Allentown flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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